You can make your AirTag last 10 years on a single battery
SMRTR summary
Apple AirTags require battery replacements every one to two years, creating maintenance frustration for users. ElevationLabs' TimeCapsule case uses two AA lithium batteries to power an AirTag for up to 10 years while providing IP69-rated protection against dust and water. The $20 case maintains full tracking range and accuracy, though it slightly muffles the speaker and significantly increases size, making it better suited for luggage or toolboxes rather than everyday carry items.
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